scope:

This recommendation is intended to standardize the measurement of the performance of radio transmitters and, thus, to make meaningful the comparison of measurements made by different observers. It is confined to giving details of selected methods for those parameters for which unreliable or ambiguous results may be obtained if varying methods or conditions are used. The methods are neither mandatory nor limiting; a choice can be made in each particular case. If necessary, additional measurements may be performed, but these shall preferably comply with the requirements of other IEC publications, or recommendations of other international bodies. This part, which shall be used in conjunction with IEC Publication 244-1 and if applicable, with other parts, describes the conditions and methods to be used to measure the quality of the signal at the output of the transmitter. The methods are applicable to: - amplitude-modulated transmitters with full carrier, either for radiotelephony or sound broadcasting; - amplitude-modulated transmitters with reduced or suppressed carrier, either for single-channel or multi-channel radiotelephony with not more than four channels; - frequency-modulated transmitters for monophonic sound broadcasting.